????????????????????2????????17??? ??????????2???????????????????????????17??,???????????????,??

???,2????????16????,?????“??????????”???????????????????????????????????????,??????????????????????,???,??????????????,??????????????????(??)

??:?? “????”????

?? ??????????:???????

????:1?????:???????????

2??????

3?????????

4?????v

5?????sn??

????????????????????2????????17??? ??????????2???????????????????????????17??,???????????????,??

???,2????????16????,?????“??????????”???????????????????????????????????????,??????????????????????,???,??????????????,??????????????????(??)

??:??